Li Yao logged off again to rest, then came back online fully refreshed.
Although it's referred to as refurbishing, it's tantamount to creating anew. Besides the mechanical core, most other components required fresh materials to properly upgrade.
Li Yao's only concern was that he hadn't found something akin to the Flame Emblem that would allow the Death God 4000's core to evolve.
Li Yao's only reliance was the high quality materials and some elements retrieved from relics that he couldn't produce himself.
Of course, Li Yao knew that as long as he replaced the materials, the odds of Death God 4000 becoming a mid-level boss were high. His main concern was not obtaining useful skills.
Since he had the Spider Tank Blueprint, Li Yao's concept for Death God 4000 became a warehouse with distant firepower, similar to that of a hunter's job.
While Li Yao was busy with the puppet production, other players were not idling. As they approached level 20, everyone was in a rush to prepare.